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CVE-2023-23447· NVD / CVE Program· CNA SICK AG

Uncontrolled Resource Consumption in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114, 1120116, 1122524, 112252

Uncontrolled Resource Consumption in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114, 1120116, 1122524, 1122526 allows an unprivileged remote attacker to influence the availability of the webserver by invocing several open file requests via the REST interface.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
May 15, 2023
Updated
Jun 17, 2026
EPSS
1.1% · 65th percentile
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Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.1%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.5
CNA · SICK AG
7.5
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

VendorProduct
sickftmg-esd20axx firmware
sickftmg-esd20axx
sickftmg-esd25axx firmware
sickftmg-esd25axx
sickftmg-esn40sxx firmware
sickftmg-esn40sxx
sickftmg-esn50sxx firmware
sickftmg-esn50sxx
sickftmg-esr50sxx firmware
sickftmg-esr50sxx
sickftmg-esr40sxx firmware
sickftmg-esr40sxx

and 2 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • sick ftmg-esd15axx firmwarebefore 2.0
  • sick ftmg-esd20axx firmwarebefore 2.0
  • sick ftmg-esd25axx firmwarebefore 2.0
  • sick ftmg-esn40sxx firmwarebefore 2.0
  • sick ftmg-esn50sxx firmwarebefore 2.0
  • sick ftmg-esr40sxx firmwarebefore 2.0
  • sick ftmg-esr50sxx firmwarebefore 2.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (SICK AG). Independent of NVD's CPE analysis and usually ahead of it.

  • SICK AG SICK FTMG-ESD15AXX AIR FLOW SENSOR

    • before v3.0.0.131.Releaseaffected · *

  • SICK AG SICK FTMG-ESD20AXX AIR FLOW SENSOR

    • before v3.0.0.131.Releaseaffected · *

  • SICK AG SICK FTMG-ESD25AXX AIR FLOW SENSOR

    • before v3.0.0.131.Releaseaffected · *

  • SICK AG SICK FTMG-ESN40SXX AIR FLOW SENSOR

    • before v3.0.0.131.Releaseaffected · *

  • SICK AG SICK FTMG-ESN50SXX AIR FLOW SENSOR

    • before v3.0.0.131.Releaseaffected · *

  • SICK AG SICK FTMG-ESR40SXX AIR FLOW SENSOR

    • before v3.0.0.131.Releaseaffected · *

  • SICK AG SICK FTMG-ESR50SXX AIR FLOW SENSOR

    • before v3.0.0.131.Releaseaffected · *

Same product

sick: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-23450Use of Password Hash Instead of Password for Authentication in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114
    39Monitor
  • CVE-2023-31409Uncontrolled Resource Consumption in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114, 1120116, 1122524, 112252
    30Monitor
  • CVE-2023-31408Cleartext Storage of Sensitive Information in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114, 1120116, 112252
    30Monitor
  • CVE-2023-23446Improper Access Control in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114, 1120116, 1122524, 1122526 allows a
    30Monitor
  • CVE-2023-23445Improper Access Control in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114, 1120116, 1122524, 1122526 allows a
    30Monitor
  • CVE-2023-23449Observable Response Discrepancy in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114, 1120116, 1122524, 1122526
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
SICK AG SICK FTMG-ESD15AXX AIR FLOW SENSORv3.0.0.131.ReleaseVendor (CNA)
SICK AG SICK FTMG-ESD20AXX AIR FLOW SENSORv3.0.0.131.ReleaseVendor (CNA)
SICK AG SICK FTMG-ESD25AXX AIR FLOW SENSORv3.0.0.131.ReleaseVendor (CNA)
SICK AG SICK FTMG-ESN40SXX AIR FLOW SENSORv3.0.0.131.ReleaseVendor (CNA)
SICK AG SICK FTMG-ESN50SXX AIR FLOW SENSORv3.0.0.131.ReleaseVendor (CNA)
SICK AG SICK FTMG-ESR40SXX AIR FLOW SENSORv3.0.0.131.ReleaseVendor (CNA)
SICK AG SICK FTMG-ESR50SXX AIR FLOW SENSORv3.0.0.131.ReleaseVendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
function expand(node) {  return node.children.map(expand);}

Fixed

ts
const MAX_DEPTH = 32;function expand(node, depth = 0) {  if (depth > MAX_DEPTH) throw new Error("too deep");  return node.children.map((c) => expand(c, depth + 1));}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records